I'm not full of hate Tibs, I don't hate anyone. And I agree that possession of marijuana shouldn't be a federal crime. But I'm also not naïve enough to think that this was done altruistically, if it was, it could have been one of his gajillion EOs he made on day 1. It was not so it isn't. But gross motives don't always have bad outcomes.
Oddly, no one is even in jail for it federally:
"Officials said there are currently no Americans serving prison time solely on federal simple marijuana possession charges. But they said the number who had been charged with that crime was north of 6,500."
https://www.cnn.com/2022/10/06/politics/marijuana-decriminalization-white-house-joe-biden#:~:text=Marijuana is illegal under federal,a high potential for abuse.”